--- a/src/ov.h
+++ b/src/ov.h
@@ -847,13 +847,18 @@
   Array<FloatComplex> float_complex_vector_value (bool frc_str_conv = false,
 				       bool frc_vec_conv = false) const;
 
-  // Make a copy that is not a special null matrix
+  // Possibly economize a lazy-indexed value.
 
-  octave_value non_null_value (void) const;
+  void maybe_economize (void)
+    { rep->maybe_economize (); }
+
+  // Make a copy suitable for storing.
+
+  octave_value storable_value (void) const;
 
   // Ditto, but in place.
 
-  void make_non_null_value (void);
+  void make_storable_value (void);
 
   // Conversions.  These should probably be private.  If a user of this
   // class wants a certain kind of constant, he should simply ask for